With DS (my first) I used one type of stash at a time; selling it all and restashing when needs changed.
With DD1 I had a very varied stash and really didn't like it. She was hard to diaper though (skin issues, reflux, too skinny/bad fit, hated being wet) which is why I tried so many things with her.
With DD2 I'd really like to get back to one thing. I hate having so many things to sort with the laundry. I might actually be able to do it; she seems to be comfortable in anything and she is chunky enough that everything fits her well.